Grandstream phones

http://www.grandstream.com/support
 

i  do.  i really like them because they are web configurable (as well as provisionable via TFTP)

I am using them.   I really like them.  Very easy to use.  Cheap and you do not need to be a programmer to know how make them work.  
I found this video before I bought the system and phones.  They have been working great for me over mesh.  

https://www.youtube.com/watch?v=U_Y5bSbrFd4

Great basic setup video.  

 

Another brand to consider is Yealink, http://www.yealink.com  They also are configurable via web and tftp as well as other means. I've seen them sold on Amazon singly and it blocks of 6 which drop the price down. I've also compared the handset audio with Grandstream. The Grandstream handset sounds a little tinny compared to the Yealink.

Just my $0.02 ....